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{{Taxobox
| color = lightgreen
| name = ''Oenothera biennis''
| image = Oenothera biennis 20050825 962.jpg
| image_width = 240px
| regnum = [[Plant]]ae
| divisio = [[Magnoliophyta]]
| classis = [[Magnoliopsida]]
| ordo = [[Myrtales]]
| familia = [[Onagraceae]]
| genus = ''[[Oenothera]]''
| species = '''''O. biennis'''''
| binomial = ''Oenothera biennis''
| binomial_authority = [[Carolus Linnaeus|L.]]
}}
'''''Oenothera biennis''''' ('''Common evening primrose''' or '''Evening star'''), is a [[biennial plant|biennial]] [[flowering plant]] growing to 1.2 m (3 to 4 ft), with easy [[germination]]. It is also known as Weedy evening-primrose, German rampion, hog weed, King's cure-all, and fever-plant.
Its [[hermaphrodite]], pale yellow [[flower]]s bloom for most of the summer, from June to September. They open in the evening, hence the name "evening primrose", and are [[Pollination|pollinated]] by [[Lepidoptera]] (Moths and Butterflies) and [[bee]]s.
The mature seeds contain approximately 7-10[[%]] [[gamma-linolenic acid]], a rare [[essential fatty acid]]. The ''O. biennis'' seed oil is used to reduce the pains of [[premenstrual stress syndrome]] and is beneficial to the skin of the face.{{Fact|date=February 2007}} Also, poultices containing ''O. biennis'' were at one time used to ease [[bruise]]s and speed [[wound]] healing.{{Fact|date=February 2007}}
The flower has an unusual response to ultraviolet light [http://www.naturfotograf.com/UV_OENO_BIE.html]. A brilliantly [[nectar guide|colored center]], invisible in visible light, is boldly apparent under ultraviolet.
==References==
* {{cite book | author=[[Neltje Blanchan|Blanchan, Neltje]] | title=[[Wild Flowers Worth Knowing]] | year=[[2005]] | publisher=[[Project Gutenberg|Project Gutenberg Literary Archive Foundation]]}}
{{Commons|Oenothera biennis}}
[[Category:Onagraceae]]
[[Category:Medicinal plants]]
{{Rosid-stub}}
{{Link FA|de}}
| color = lightgreen
| name = ''Oenothera biennis''
| image = Oenothera biennis 20050825 962.jpg
| image_width = 240px
| regnum = [[Plant]]ae
| divisio = [[Magnoliophyta]]
| classis = [[Magnoliopsida]]
| ordo = [[Myrtales]]
| familia = [[Onagraceae]]
| genus = ''[[Oenothera]]''
| species = '''''O. biennis'''''
| binomial = ''Oenothera biennis''
| binomial_authority = [[Carolus Linnaeus|L.]]
}}
'''''Oenothera biennis''''' ('''Common evening primrose''' or '''Evening star'''), is a [[biennial plant|biennial]] [[flowering plant]] growing to 1.2 m (3 to 4 ft), with easy [[germination]]. It is also known as Weedy evening-primrose, German rampion, hog weed, King's cure-all, and fever-plant.
Its [[hermaphrodite]], pale yellow [[flower]]s bloom for most of the summer, from June to September. They open in the evening, hence the name "evening primrose", and are [[Pollination|pollinated]] by [[Lepidoptera]] (Moths and Butterflies) and [[bee]]s.
The mature seeds contain approximately 7-10[[%]] [[gamma-linolenic acid]], a rare [[essential fatty acid]]. The ''O. biennis'' seed oil is used to reduce the pains of [[premenstrual stress syndrome]] and is beneficial to the skin of the face.{{Fact|date=February 2007}} Also, poultices containing ''O. biennis'' were at one time used to ease [[bruise]]s and speed [[wound]] healing.{{Fact|date=February 2007}}
The flower has an unusual response to ultraviolet light [http://www.naturfotograf.com/UV_OENO_BIE.html]. A brilliantly [[nectar guide|colored center]], invisible in visible light, is boldly apparent under ultraviolet.
==References==
* {{cite book | author=[[Neltje Blanchan|Blanchan, Neltje]] | title=[[Wild Flowers Worth Knowing]] | year=[[2005]] | publisher=[[Project Gutenberg|Project Gutenberg Literary Archive Foundation]]}}
{{Commons|Oenothera biennis}}
[[Category:Onagraceae]]
[[Category:Medicinal plants]]
{{Rosid-stub}}
{{Link FA|de}}
